Makeconfig

   1 # Copyright (C) 1991-2000,01,02, 03 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Lesser General Public
   6 # License as published by the Free Software Foundation; either
   7 # version 2.1 of the License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Lesser General Public License for more details.
  13
  14 # You should have received a copy of the GNU Lesser General Public
  15 # License along with the GNU C Library; if not, write to the Free
  16 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17 # 02111-1307 USA.
  18
  19 #
  20 #       Makefile configuration options for the GNU C library.
  21 #
  22 ifneq (,)
  23 This makefile requires GNU Make.
  24 endif
  25
  26 all: # Make this the default goal
  27
  28 ifneq "$(origin +included-Makeconfig)" "file"
  29
  30 +included-Makeconfig := yes
  31
  32 ifdef subdir
  33 .. := ../
  34 endif
  35
  36 # If config.make exists, the source directory was configured,
  37 # so don't try to be clever and find another directory to build in.
  38 ifneq (,$(wildcard $(..)config.make))
  39 ARCH =
  40 machine =
  41 else    # Not configured.
  42 ifndef ARCH
  43 ifdef machine
  44 ARCH = $(machine)
  45 endif # machine
  46 endif # ARCH
  47 endif # config.make
  48
  49 # Directory for object files and libc.a.  If this is not defined, the
  50 # object files live in the subdirectories where their sources live, and
  51 # libc.a lives in the parent directory (this probably doesn't work any
  52 # more).
  53 ifdef ARCH
  54 ifeq ($(filter /%,$(ARCH)),)
  55 objdir := $(..)$(ARCH)
  56 else
  57 objdir = $(ARCH)
  58 endif
  59 endif
  60
  61 # $(common-objdir) is the place to put objects and
  62 # such that are not specific to a single subdir.
  63 ifdef objdir
  64 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
  65 common-objpfx = $(objdir)/
  66 common-objdir = $(objdir)
  67 else
  68 objpfx :=
  69 ifdef ..
  70 common-objpfx = $(..)
  71 common-objdir = ..
  72 else
  73 # This is a kludge.  make wizards might grok.
  74 common-objpfx = sysdeps/../
  75 common-objdir = .
  76 endif
  77 endif
  78
  79 # Root of the sysdeps tree.
  80 sysdep_dir := $(..)sysdeps
  81 export sysdep_dir := $(sysdep_dir)
  82
  83 # Get the values defined by options to `configure'.
  84 include $(common-objpfx)config.make
  85
  86 # What flags to give to sources which call user provided callbacks
  87 uses-callbacks = $(exceptions)
  88
  89 # What flags to give to tests which test stack alignment
  90 stack-align-test-flags =
  91
  92 # We have a special subdir for each binary format.
  93 # For now, only ELF is fully supported.
  94 ifeq ($(elf),yes)
  95 binfmt-subdir = elf
  96 else
  97 # This is probably better than nothing.
  98 binfmt-subdir = aout
  99 endif
 100
 101 # Complete path to sysdep dirs.
 102 export full_config_sysdirs := $(addprefix $(..),$(config-sysdirs))
 103
 104 # Run config.status to update config.make and config.h.  We don't show the
 105 # dependence of config.h to Make, because it is only touched when it
 106 # changes and so config.status would be run every time; the dependence of
 107 # config.make should suffice to force regeneration and re-exec, and the new
 108 # image will notice if config.h changed.
 109 $(common-objpfx)config.make: $(common-objpfx)config.status \
 110                              $(..)config.make.in $(..)config.h.in
 111         cd $(<D); $(SHELL) $(<F)
 112
 113 # Find all the sysdeps configure fragments, to make sure we re-run
 114 # configure when any of them changes.
 115 $(common-objpfx)config.status: $(..)version.h $(..)configure \
 116                                $(foreach dir,$(full_config_sysdirs),\
 117                                          $(wildcard \
 118                                            $(dir)/Implies) \
 119                                          $(patsubst %.in,%,\
 120                                                     $(firstword $(wildcard \
 121  $(addprefix $(dir)/,configure configure.in)))))
 122         @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
 123          echo The GNU C library has not been configured. >&2; \
 124          echo Run \`configure\' to configure it before building. >&2; \
 125          echo Try \`configure --help\' for more details. >&2; \
 126          exit 1; fi
 127
 128 # We don't want CPPFLAGS to be exported to the command running configure.
 129 unexport CPPFLAGS
 130
 131 # Get the user's configuration parameters.
 132 ifneq ($(wildcard $(..)configparms),)
 133 include $(..)configparms
 134 endif
 135 ifneq ($(objpfx),)
 136 ifneq ($(wildcard $(common-objpfx)configparms),)
 137 include $(common-objpfx)configparms
 138 endif
 139 endif
 140 \f
 141 ####
 142 ####    These are the configuration variables.  You can define values for
 143 ####    the variables below in the file `configparms'.
 144 ####    Do NOT edit this file.
 145 ####
 146
 147
 148 # Common prefix for machine-independent installation directories.
 149 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
 150 prefix = /usr/local
 151 endif
 152
 153 # Decide whether we shall build the programs or not.  We always do this
 154 # unless the user tells us (in configparms) or we are building for a
 155 # standalone target.
 156 ifndef build-programs
 157 ifneq ($(config-os),none)
 158 build-programs=yes
 159 else
 160 build-programs=no
 161 endif
 162 endif
 163
 164 # Common prefix for machine-dependent installation directories.
 165 ifeq ($(origin exec_prefix),undefined)
 166 exec_prefix = $(prefix)
 167 endif
 168
 169 # Where to install the library and object files.
 170 ifndef libdir
 171 libdir = $(exec_prefix)/lib
 172 endif
 173 inst_libdir = $(install_root)$(libdir)
 174
 175 # Where to install the shared library and dynamic linker.
 176 ifndef slibdir
 177 slibdir = $(exec_prefix)/lib
 178 endif
 179 inst_slibdir = $(install_root)$(slibdir)
 180
 181 # Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
 182 # the prefix is spliced between `lib' and the name, so the linker switch
 183 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
 184 # just prepended to the whole file name.
 185 ifeq ($(origin libprefix),undefined)
 186 libprefix =
 187 endif
 188
 189 # Where to install the header files.
 190 ifndef includedir
 191 includedir = $(prefix)/include
 192 endif
 193 inst_includedir = $(install_root)$(includedir)
 194
 195 # Where to install machine-independent data files.
 196 # These are the timezone database, and the locale database.
 197 ifndef datadir
 198 datadir = $(prefix)/share
 199 endif
 200 inst_datadir = $(install_root)$(datadir)
 201
 202 # Where to install the timezone data files (which are machine-independent).
 203 ifndef zonedir
 204 zonedir = $(datadir)/zoneinfo
 205 endif
 206 inst_zonedir = $(install_root)$(zonedir)
 207
 208 # Where to install the locale files.
 209 ifndef localedir
 210 localedir = $(libdir)/locale
 211 endif
 212 inst_localedir = $(install_root)$(localedir)
 213
 214 # Where to install the message catalog data files (which are
 215 # machine-independent).
 216 ifndef msgcatdir
 217 msgcatdir = $(datadir)/locale
 218 endif
 219 inst_msgcatdir = $(install_root)$(msgcatdir)
 220
 221 # Where to install the locale charmap source files.
 222 ifndef i18ndir
 223 i18ndir = $(datadir)/i18n
 224 endif
 225 inst_i18ndir = $(install_root)$(i18ndir)
 226
 227 # Where to install the shared object for charset transformation.
 228 ifndef gconvdir
 229 gconvdir = $(libdir)/gconv
 230 endif
 231 inst_gconvdir = $(install_root)$(gconvdir)
 232
 233 # Where to install programs.
 234 ifndef bindir
 235 bindir = $(exec_prefix)/bin
 236 endif
 237 inst_bindir = $(install_root)$(bindir)
 238
 239 # Where to install internal programs.
 240 ifndef libexecdir
 241 libexecdir = $(exec_prefix)/libexec
 242 endif
 243 inst_libexecdir = $(install_root)$(libexecdir)
 244
 245 # Where to install administrative programs.
 246 ifndef rootsbindir
 247 rootsbindir = $(exec_prefix)/sbin
 248 endif
 249 inst_rootsbindir = $(install_root)$(rootsbindir)
 250
 251 ifndef sbindir
 252 sbindir = $(exec_prefix)/sbin
 253 endif
 254 inst_sbindir = $(install_root)$(sbindir)
 255
 256 # Where to install the Info files.
 257 ifndef infodir
 258 infodir = $(prefix)/info
 259 endif
 260 inst_infodir = $(install_root)$(infodir)
 261
 262 # Where to install default configuration files.  These include the local
 263 # timezone specification and network data base files.
 264 ifndef sysconfdir
 265 sysconfdir = $(prefix)/etc
 266 endif
 267 inst_sysconfdir = $(install_root)$(sysconfdir)
 268
 269 # What timezone should be the installed default (e.g., US/Eastern).
 270 # Run `make -C time echo-zonenames' to see a list of available zone names.
 271 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
 272 ifndef localtime
 273 localtime = Factory
 274 endif
 275
 276 # Where to install the "localtime" timezone file; this is the file whose
 277 # contents $(localtime) specifies.  If this is a relative pathname, it is
 278 # relative to $(zonedir).  It is a good idea to put this somewhere
 279 # other than there, so the zoneinfo directory contains only universal data,
 280 # localizing the configuration data elsewhere.
 281 ifndef localtime-file
 282 localtime-file = $(sysconfdir)/localtime
 283 inst_localtime-file = $(install_root)$(localtime-file)
 284 endif
 285
 286 # What to use for leap second specifications in compiling the default
 287 # timezone files.  Set this to `/dev/null' for no leap second handling as
 288 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
 289 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
 290 # This variable determines the default: if it's `/dev/null',
 291 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
 292 ifndef leapseconds
 293 leapseconds = /dev/null
 294 endif
 295
 296 # What timezone's DST rules should be used when a POSIX-style TZ
 297 # environment variable doesn't specify any rules.  For 1003.1 compliance
 298 # this timezone must use rules that are as U.S. federal law defines DST.
 299 # Run `make -C time echo-zonenames' to see a list of available zone names.
 300 # This setting can be changed with `zic -p TIMEZONE' at any time.
 301 # If you want POSIX.1 compatibility, use `America/New_York'.
 302 ifndef posixrules
 303 posixrules = America/New_York
 304 endif
 305
 306 # Where to install the "posixrules" timezone file; this is file
 307 # whose contents $(posixrules) specifies.  If this is a relative
 308 # pathname, it is relative to $(zonedir).
 309 ifndef posixrules-file
 310 posixrules-file = posixrules
 311 endif
 312
 313
 314 # Directory where your system's native header files live.
 315 # This is used on Unix systems to generate some GNU libc header files.
 316 ifndef sysincludedir
 317 sysincludedir = /usr/include
 318 endif
 319
 320
 321 # Commands to install files.
 322 ifndef INSTALL_DATA
 323 INSTALL_DATA = $(INSTALL) -m 644
 324 endif
 325 ifndef INSTALL_SCRIPT
 326 INSTALL_SCRIPT = $(INSTALL)
 327 endif
 328 ifndef INSTALL_PROGRAM
 329 INSTALL_PROGRAM = $(INSTALL)
 330 endif
 331 ifndef INSTALL
 332 INSTALL = install
 333 endif
 334
 335
 336 # The name of the C compiler.
 337 # If you've got GCC, and it works, use it.
 338 ifeq ($(origin CC),default)
 339 CC := gcc
 340 endif
 341
 342 # The name of the C compiler to use for compilations of programs to run on
 343 # the host that is building the library.  If you set CC to a
 344 # cross-compiler, you must set this to the normal compiler.
 345 ifndef BUILD_CC
 346 BUILD_CC = $(CC)
 347 endif
 348
 349 # Default flags to pass the C compiler.
 350 ifndef default_cflags
 351 ifeq ($(release),stable)
 352 default_cflags := -g -O2
 353 else
 354 default_cflags := -g -O
 355 endif
 356 endif
 357
 358 # Flags to pass the C compiler when assembling preprocessed assembly code
 359 # (`.S' files).  On some systems the assembler doesn't understand the `#' line
 360 # directives the preprocessor produces.  If you have troubling compiling
 361 # assembly code, try using -P here to suppress these directives.
 362 ifndef asm-CPPFLAGS
 363 asm-CPPFLAGS =
 364 endif
 365
 366 # ELF always supports init/fini sections
 367 ifeq ($(elf),yes)
 368 have-initfini = yes
 369 endif
 370
 371 # Installed name of the startup code.
 372 ifneq ($(have-initfini),yes)
 373 # When not having init/fini, there is just one startfile, called crt0.o.
 374 start-installed-name = crt0.o
 375 else
 376 # On systems having init/fini, crt0.o is called crt1.o, and there are
 377 # some additional bizarre files.
 378 start-installed-name = crt1.o
 379 endif
 380 # On systems that do not need a special startfile for statically linked
 381 # binaries, simply set it to the normal name.
 382 ifndef static-start-installed-name
 383 static-start-installed-name = $(start-installed-name)
 384 endif
 385
 386 ifeq (yesyesyes,$(build-shared)$(elf)$(have-z-combreloc))
 387 combreloc-LDFLAGS = -Wl,-z,combreloc
 388 LDFLAGS.so += $(combreloc-LDFLAGS)
 389 LDFLAGS-rtld += $(combreloc-LDFLAGS)
 390 endif
 391
 392 # Command for linking programs with the C library.
 393 ifndef +link
 394 +link = $(CC) -nostdlib -nostartfiles -o $@ \
 395               $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
 396               $(combreloc-LDFLAGS) \
 397               $(addprefix $(csu-objpfx),$(start-installed-name)) \
 398               $(+preinit) $(+prector) \
 399               $(filter-out $(addprefix $(csu-objpfx),start.o \
 400                                                      $(start-installed-name))\
 401                            $(+preinit) $(link-extra-libs) \
 402                            $(common-objpfx)libc% $(+postinit),$^) \
 403               $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
 404 endif
 405 # Command for statically linking programs with the C library.
 406 ifndef +link-static
 407 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
 408               $(sysdep-LDFLAGS) $(LDFLAGS)  \
 409               $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
 410               $(+preinit) $(+prector) \
 411               $(filter-out $(addprefix $(csu-objpfx),start.o \
 412                                                      $(start-installed-name))\
 413                            $(+preinit) $(link-extra-libs-static) \
 414                            $(common-objpfx)libc% $(+postinit),$^) \
 415               $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
 416 endif
 417 # Command for statically linking bounded-pointer programs with the C library.
 418 ifndef +link-bounded
 419 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
 420               $(sysdep-LDFLAGS) $(LDFLAGS)  \
 421               $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
 422               $(+preinit) $(+prector) \
 423               $(filter-out $(addprefix $(csu-objpfx),start.ob \
 424                                                      $(start-installed-name))\
 425                            $(+preinit) $(link-extra-libs-bounded) \
 426                            $(common-objpfx)libc% $(+postinit),$^) \
 427               $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctor) $(+postinit)
 428 endif
 429 ifndef config-LDFLAGS
 430 ifeq (yesyes,$(build-shared)$(elf))
 431 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
 432 endif
 433 endif
 434 ifndef link-libc
 435 ifeq (yes,$(build-shared))
 436 ifeq ($(elf),yes)
 437 # We need the versioned name of libc.so in the deps of $(others) et al
 438 # so that the symlink to libc.so is created before anything tries to
 439 # run the linked programs.
 440 link-libc = -Wl,-rpath-link=$(rpath-link) \
 441             $(common-objpfx)libc.so$(libc.so-version) \
 442             $(common-objpfx)$(patsubst %,$(libtype.oS),c) $(gnulib)
 443 # This is how to find at build-time things that will be installed there.
 444 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
 445 else
 446 ifneq (,$(filter aix aix%,$(config-os)))
 447 link-libc = $(common-objpfx)libc.a \
 448             $(common-objpfx)$(patsubst %,$(libtype.oS),c) $(gnulib)
 449 rpath-dirs = math dlfcn nss nis rt resolv crypt
 450 endif
 451 endif
 452 rpath-link = \
 453 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
 454 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
 455 else
 456 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
 457 resolvobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)resolv)
 458 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
 459 endif
 460 endif
 461
 462 # Differences in the linkers on the various platforms.
 463 ifeq ($(elf),yes)
 464 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
 465 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
 466 LDFLAGS-rdynamic = -rdynamic
 467 LDFLAGS-Bsymbolic = -Bsymbolic
 468 else
 469 ifneq (,$(filter aix aix%,$(config-os)))
 470 LDFLAGS-rpath-ORIGIN =
 471 LDFLAGS-soname-fname =
 472 LDFLAGS-rdynamic = -Wl,-bdynamic
 473 LDFLAGS-Bsymbolic = -Wl,-bsymbolic
 474 endif
 475 endif
 476
 477 # Choose the default search path for the dynamic linker based on
 478 # where we will install libraries.
 479 ifneq ($(libdir),$(slibdir))
 480 default-rpath = $(slibdir):$(libdir)
 481 else
 482 default-rpath = $(libdir)
 483 endif
 484
 485 ifndef link-extra-libs
 486 ifeq (yes,$(build-shared))
 487 ifneq ($(common-objpfx),$(objpfx))
 488 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
 489         $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
 490                    $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
 491 else
 492 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
 493 endif
 494 else
 495 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
 496 endif
 497 endif
 498
 499 # The static libraries.
 500 ifeq (yes,$(build-static))
 501 link-libc-static = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
 502 link-extra-libs-static = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
 503 else
 504 ifeq (yes,$(build-shared))
 505 # We can try to link the programs with lib*_pic.a...
 506 link-libc-static = $(gnulib) $(common-objpfx)libc_pic.a
 507 link-extra-libs-static = $(link-extra-libs)
 508 endif
 509 endif
 510 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
 511 link-extra-libs-bounded = $(foreach lib,$(LDLIBS-$(@F:%-bp=%)),$(common-objpfx)$(lib)_b.a)
 512
 513 ifndef gnulib
 514 gnulib := -lgcc -lgcc_eh
 515 endif
 516 ifeq ($(elf),yes)
 517 +preinit = $(addprefix $(csu-objpfx),crti.o)
 518 +postinit = $(addprefix $(csu-objpfx),crtn.o)
 519 +prector = `$(CC) --print-file-name=crtbegin.o`
 520 +postctor = `$(CC) --print-file-name=crtend.o`
 521 +interp = $(addprefix $(elf-objpfx),interp.os)
 522 endif
 523 csu-objpfx = $(common-objpfx)csu/
 524 elf-objpfx = $(common-objpfx)elf/
 525
 526 # How to run a program we just linked with our library.
 527 # The program binary is assumed to be $(word 2,$^).
 528 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
 529 ifeq (yesyes,$(build-shared)$(elf))
 530 comma = ,
 531 sysdep-library-path = \
 532 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
 533                                        $(filter -Wl$(comma)-rpath-link=%,\
 534                                                 $(sysdep-LDFLAGS)))))
 535 run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
 536                                    $(tests-static)),, \
 537                           $(elf-objpfx)$(rtld-installed-name) \
 538                           --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
 539 else
 540 run-program-prefix =
 541 endif
 542 # Never use $(run-program-prefix) for the statically-linked %-bp test programs
 543 built-program-cmd = $(patsubst %,$(run-program-prefix),\
 544                         $(filter-out %-bp,$(built-program-file))) \
 545                     $(built-program-file)
 546
 547 ifndef LD
 548 LD := ld -X
 549 endif
 550
 551 ifndef  RANLIB
 552 RANLIB = ranlib
 553 endif
 554
 555 # Extra flags to pass to GCC.
 556 ifeq ($(all-warnings),yes)
 557 +gccwarn := -Wall -Wwrite-strings -Winline -Wstrict-prototypes -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
 558 else
 559 +gccwarn := -Wall -Wwrite-strings -Winline -Wstrict-prototypes
 560 endif
 561
 562 # This is the program that generates makefile dependencies from C source files.
 563 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
 564 # targets for headers so that removed headers don't break the build.
 565 ifndef +mkdep
 566 +mkdep = $(CC) -M -MP
 567 endif
 568
 569 # The program that makes Emacs-style TAGS files.
 570 ETAGS   := etags
 571
 572 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
 573 # perhaps others) to preprocess assembly code in some cases.
 574 M4 = m4
 575
 576 # To force installation of files even if they are older than the
 577 # installed files.  This variable is included in the dependency list
 578 # of all installation targets.
 579 ifeq ($(force-install),yes)
 580 +force = force-install
 581 else
 582 +force =
 583 endif
 584
 585 ####
 586 #### End of configuration variables.
 587 ####
 588 \f
 589 # This tells some versions of GNU make before 3.63 not to export all variables.
 590 .NOEXPORT:
 591
 592 # We want to echo the commands we're running without
 593 # umpteen zillion filenames along with it (we use `...' instead)
 594 # but we don't want this echoing done when the user has said
 595 # he doesn't want to see commands echoed by using -s.
 596 ifneq   "$(findstring s,$(MAKEFLAGS))" ""       # if -s
 597 +cmdecho        := echo >/dev/null
 598 else                                            # not -s
 599 +cmdecho        := echo
 600 endif                                           # -s
 601
 602 # These are the flags given to the compiler to tell
 603 # it what sort of optimization and/or debugging output to do.
 604 ifndef  +cflags
 605 # If `CFLAGS' was defined, use that.
 606 ifdef           CFLAGS
 607 +cflags := $(filter-out -I%,$(CFLAGS))
 608 endif           # CFLAGS
 609 endif   # +cflags
 610
 611 # If none of the above worked, default to "-g -O".
 612 ifeq    "$(strip $(+cflags))" ""
 613 +cflags := $(default_cflags)
 614 endif   # $(+cflags) == ""
 615
 616 +cflags := $(+cflags) $(+gccwarn)
 617 +gcc-nowarn := -w
 618
 619 # Don't duplicate options if we inherited variables from the parent.
 620 +cflags := $(sort $(+cflags))
 621
 622
 623 # These are flags given to the C compiler to tell it to look for include
 624 # files (including ones given in angle brackets) in the current directory,
 625 # in the parent library source directory and in the include directory.
 626 # `+sysdep-includes' will be defined by Makerules.
 627 +includes = -I$(..)include -I. \
 628             $(patsubst %/,-I%,$(objpfx)) $(patsubst %/,-I%,$(..)) \
 629             $(libio-include) $(includes) \
 630             $(+sysdep-includes) $(sysincludes)
 631
 632 # Since libio has several internal header files, we use a -I instead
 633 # of many little headers in the include directory.
 634 libio-include = -I$(..)libio
 635
 636 # These are the variables that the implicit compilation rules use.
 637 # Note that we can't use -std=* in CPPFLAGS, because it overrides
 638 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
 639 # it causes cpp to stop predefining __ASSEMBLER__.
 640 CPPFLAGS = $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
 641            -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
 642            $(CPPFLAGS-$(suffix $@)) \
 643            $(foreach lib,$(libof-$(basename $(@F))) \
 644                          $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
 645            $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
 646 override CFLAGS = -std=gnu99 \
 647                   $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
 648                   $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
 649
 650 # If everything is compiled with -fPIC (implicitly) we must tell this by
 651 # defining the PIC symbol.
 652 ifeq (yes,$(build-pic-default))
 653 pic-default = -DPIC
 654 endif
 655
 656 # Enable object files for different versions of the library.
 657 # Various things use $(object-suffixes) to know what all to make.
 658 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
 659 # to pass different flags for each flavor.
 660 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
 661 all-object-suffixes := .o .os .op .og .ob .oS
 662 object-suffixes :=
 663 CPPFLAGS-.o = $(pic-default)
 664 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
 665 ifeq (yes,$(build-static))
 666 libtype.o := lib%.a
 667 object-suffixes += .o
 668 endif
 669 ifeq (yes,$(build-shared))
 670 # Under --enable-shared, we will build a shared library of PIC objects.
 671 # The PIC object files are named foo.os.
 672 object-suffixes += .os
 673 CPPFLAGS-.os = -DPIC -DSHARED
 674 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
 675 libtype.os := lib%_pic.a
 676 # This can be changed by a sysdep makefile
 677 pic-ccflag = -fPIC
 678 # This one should always stay like this unless there is a very good reason.
 679 PIC-ccflag = -fPIC
 680 endif
 681 ifeq (yes,$(build-profile))
 682 # Under --enable-profile, we will build a static library of profiled objects.
 683 # The profiled object files are named foo.op.
 684 object-suffixes += .op
 685 CPPFLAGS-.op = -DPROF $(pic-default)
 686 CFLAGS-.op = -pg
 687 libtype.op = lib%_p.a
 688 endif
 689 ifeq (yes,$(build-omitfp))
 690 # Under --enable-omitfp, we build the library optimized without
 691 # debugging information using -fomit-frame-pointer, and build an extra
 692 # library with debugging information.  The debuggable objects are named foo.og.
 693 object-suffixes += .og
 694 CPPFLAGS-.og = $(pic-default)
 695 CFLAGS-.og = -g
 696 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 697 CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
 698 libtype.og = lib%_g.a
 699 endif
 700
 701 bppfx = BP-
 702 ifeq (yes,$(build-bounded))
 703 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
 704 # to runtime bounds checking.  The bounded-pointer objects are named foo.ob.
 705 # We disable sibling-call optimizations so that stack traces will be complete
 706 # and thus aid debugging, since after all, BPs are a debugging tool.
 707 object-suffixes += .ob
 708 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
 709 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
 710 libtype.ob = lib%_b.a
 711 endif
 712
 713 object-suffixes-for-libc := $(object-suffixes)
 714
 715 ifeq (yes,$(build-shared))
 716 # Build special library that contains the static-only routines for libc.
 717 object-suffixes-for-libc += .oS
 718
 719 # Must build the routines as PIC, though, because they can end up in (users')
 720 # shared objects.  We don't want to use CFLAGS-os because users may, for
 721 # example, make that processor-specific.
 722 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
 723 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
 724 libtype.oS = lib%_nonshared.a
 725 endif
 726
 727 # The assembler can generate debug information too.
 728 ifndef ASFLAGS
 729 ifeq ($(have-cpp-asm-debuginfo),yes)
 730 ASFLAGS := $(filter -g%,$(CFLAGS))
 731 else
 732 ASFLAGS :=
 733 endif
 734 endif
 735 ASFLAGS += $(ASFLAGS-config)
 736
 737 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
 738
 739 ifndef BUILD_CC
 740 BUILD_CC = $(CC)
 741 endif
 742
 743 move-if-change = $(SHELL) $(..)scripts/move-if-change
 744 \f
 745 -include $(common-objpfx)sysd-dirs
 746
 747 ifeq ($(sysd-dirs-done),t)
 748 -include $(common-objpfx)sysd-sorted
 749 subdirs = $(sorted-subdirs)
 750 endif
 751
 752 ifeq (yes, $(build-shared))
 753
 754 # This is a pair of implicit rules to preprocess a file with # comments,
 755 # %ifdef et al, based on config.h settings or other %include'd files.
 756 # We use chained rules instead of a pipeline here so that we can properly
 757 # check the exit status of cpp rather than using its bad output when there
 758 # is a preprocessing error.  Another rule should depend on the output file
 759 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
 760 # listing both its input files, and any header files that it may reference
 761 # (but no commands).
 762 %.v.i: $(common-objpfx)config.h
 763         sed '/^[        ]*#/d;s/^[      ]*%/#/' $(filter-out FORCE %.h,$^) \
 764         | $(CC) -E -undef $(CPPFLAGS) \
 765                    -DASSEMBLER -x assembler-with-cpp - \
 766                    > $@T
 767         mv -f $@T $@
 768 %.v: %.v.i
 769         sed '/^[        ]*#/d;/^[       ]*$$/d' $< > $@T
 770         mv -f $@T $@
 771
 772 # Process the shlib-versions file, which tells us what shared library
 773 # version numbers to use when we install shared objects on this system.
 774 # We need to wait until $(subdirs) is complete.
 775 ifeq ($(sysd-sorted-done),t)
 776 -include $(common-objpfx)soversions.mk
 777 ifndef avoid-generated
 778 $(common-objpfx)shlib-versions.v.i: \
 779         $(..)shlib-versions $(wildcard $(patsubst %, $(..)%/shlib-versions,\
 780                                                      $(add-ons) \
 781                                                      $(subdirs)))
 782 $(common-objpfx)soversions.i: $(common-objpfx)shlib-versions.v
 783         default_setname='$(filter-out %_default,$(oldest-abi:%=GLIBC_%))'; \
 784         while read conf version setname; do \
 785           test -n "$$version" && \
 786           test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
 787                      : "$$conf"` != 0 || continue; \
 788           if test "x$$version" = xDEFAULT; then \
 789             default_setname="$$setname"; \
 790           else \
 791             $(abi-default_setname) \
 792             lib=`echo $$version | sed 's/=.*$$//'`; \
 793             if eval test -z "\$${versioned_$${lib}}"; then \
 794               eval versioned_$${lib}=yes; \
 795               number=`echo $$version | sed "s/^.*=//"`; \
 796               echo $$lib $$number $${setname:-$${default_setname}}; \
 797             fi; \
 798           fi; \
 799         done < $< > $@T; exit 0
 800         mv -f $@T $@
 801 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i
 802         (while read lib number setname; do \
 803            case $$number in \
 804              [0-9]*) echo "$$lib.so-version=.$$number"; \
 805                      echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
 806              *)      echo "$$lib.so-version=$$number"; \
 807                      echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
 808            esac; \
 809          done; \
 810          echo soversions.mk-done = t;) < $< > $@T; exit 0
 811         mv -f $@T $@
 812 endif
 813 endif
 814
 815 postclean-generated += soversions.mk soversions.i \
 816                        shlib-versions.v shlib-versions.v.i
 817
 818 # Generate the header containing the names of all shared libraries.
 819 # We use a stamp file to avoid uncessary recompilations.
 820 before-compile += $(common-objpfx)gnu/lib-names.h
 821 ifeq ($(soversions.mk-done),t)
 822 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
 823 ifneq (,$(findstring aix,$(config-os)))
 824 $(common-objpfx)gnu/lib-names.stmp: $(..)sysdeps/unix/sysv/aix/gnu/lib-names.h
 825         $(make-target-directory)
 826         @rm -f ${@:stmp=T} $@
 827         @cp $(..)sysdeps/unix/sysv/aix/gnu/lib-names.h $(common-objpfx)gnu
 828         touch $@
 829 else
 830 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
 831         $(make-target-directory)
 832         @rm -f ${@:stmp=T} $@
 833         (echo '/* This file is automatically generated.';\
 834          echo '   It defines macros to allow user program to find the shared';\
 835          echo '   library files which come as part of GNU libc.  */';\
 836          echo '#ifndef __GNU_LIB_NAMES_H'; \
 837          echo '#define __GNU_LIB_NAMES_H        1'; \
 838          echo; \
 839          (libs='$(all-sonames)';\
 840           for l in $$libs; do \
 841             name=`echo $$l | sed 's/.*=//'`; \
 842             upname=`echo $$l | sed 's/=.*//' | \
 843                     tr 'abcdefghijklmnopqrstuvwxyz-' \
 844                        'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
 845             upname2=`echo $$name | sed 's/[.]so.*//' | \
 846                      tr 'abcdefghijklmnopqrstuvwxyz-' \
 847                         'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
 848             echo "#define       $${upname}_SO   \"$$name\""; \
 849             if test $$upname != $$upname2; then \
 850               echo "#define     $${upname2}_SO  \"$$name\""; \
 851             fi; \
 852           done;) | sort; \
 853          echo; \
 854          echo '#endif   /* gnu/lib-names.h */';) > ${@:stmp=T}
 855         $(move-if-change) ${@:stmp=T} ${@:stmp=h}
 856         touch $@
 857 endif
 858 endif
 859
 860 common-generated += gnu/lib-names.h gnu/lib-names.stmp
 861
 862 # The name under which the run-time dynamic linker is installed.
 863 # We are currently going for the convention that `/lib/ld.so.1'
 864 # names the SVR4/ELF ABI-compliant dynamic linker.
 865 ifndef rtld-installed-name
 866 ifdef ld.so-version
 867 rtld-installed-name = $(ld.so-version)
 868 else
 869 rtld-installed-name = ld.so.1
 870 endif
 871 endif
 872
 873 ifndef rtld-version-installed-name
 874 rtld-version-installed-name = ld-$(version).so
 875 endif
 876
 877 endif # build-shared
 878
 879
 880 ifeq ($(elf),yes)
 881 dlfcn = dlfcn
 882 ifeq ($(build-shared),yes)
 883 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 884 else
 885 libdl = $(common-objpfx)dlfcn/libdl.a
 886 endif
 887 else
 888 ifneq (,$(findstring aix,$(config-os)))
 889 ifeq ($(build-shared),yes)
 890 dlfcn = dlfcn
 891 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
 892 else
 893 # No libdl without shared libs on AIX
 894 dlfcn =
 895 libdl =
 896 endif
 897 else
 898 # No ELF, no AIX - no libdl, at least for now.
 899 dlfcn =
 900 libdl =
 901 endif
 902 endif
 903
 904 # These are the subdirectories containing the library source.  The order
 905 # is more or less arbitrary.  The sorting step will take care of the
 906 # dependencies.  Only the $(binfmt-subdir) should always be kept at the
 907 # end of the list.
 908 all-subdirs = csu assert ctype locale intl catgets math setjmp signal       \
 909               stdlib stdio-common libio malloc string wcsmbs time dirent \
 910               grp pwd posix io termios resource misc socket sysvipc gmon    \
 911               gnulib iconv iconvdata wctype manual shadow po argp           \
 912               crypt $(add-ons) nss localedata timezone rt conform debug     \
 913               $(sysdep-subdirs) $(dlfcn) $(binfmt-subdir)
 914 all-subdirs := $(filter-out $(sysdep-inhibit-subdirs),$(all-subdirs))
 915
 916 # The mach and hurd subdirectories have many generated header files which
 917 # much of the rest of the library depends on, so it is best to build them
 918 # first (and mach before hurd, at that).  The before-compile additions in
 919 # sysdeps/{mach,hurd}/Makefile should make it reliably work for these files
 920 # not to exist when making in other directories, but it will be slower that
 921 # way with more somewhat expensive `make' invocations.
 922 subdirs := $(filter mach,$(subdirs)) $(filter hurd,$(subdirs)) \
 923            $(filter-out mach hurd,$(subdirs))
 924
 925 ifndef avoid-generated
 926 all-Subdirs-files = $(wildcard $(config-sysdirs:%=$(..)%/Subdirs))
 927 $(common-objpfx)sysd-dirs: $(common-objpfx)config.make $(all-Subdirs-files)
 928         $(AWK) 'BEGIN { subdirs = ""; inhibit = "" };                   \
 929                 /^#/ { next };                                          \
 930                 /^[^-]/ { subdirs = subdirs " " $$0 };                  \
 931                 /^-/ { inhibit = inhibit " " substr($$0, 2) };          \
 932                 END { printf "sysdep-subdirs =%s\n", subdirs;           \
 933                       printf "sysdep-inhibit-subdirs =%s\n", inhibit;   \
 934                       print "sysd-dirs-done = t" }'                     \
 935                $(patsubst $<,/dev/null,$^) > $@-tmp
 936         mv -f $@-tmp $@
 937
 938 all-Depend-files = $(wildcard $(..)*/Depend)
 939 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk $(all-Depend-files) \
 940                              $(common-objpfx)sysd-dirs $(..)Makeconfig
 941         { { dirs='$(patsubst $(..)%/Depend,%,$(filter %/Depend,$^))';     \
 942             for d in $$dirs; do                                           \
 943               while read on; do                                           \
 944                 echo "depend $$d $$on";                                   \
 945               done < $(..)$$d/Depend;                                     \
 946             done;                                                         \
 947             for f in $(all-subdirs); do                                   \
 948               echo $$f;                                                   \
 949             done;                                                         \
 950           } | $(AWK) -f $< &&                                             \
 951           echo sysd-sorted-done = t;                                      \
 952         } > $@-tmp
 953         mv -f $@-tmp $@
 954 endif
 955
 956 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
 957 sysdep-makeconfigs := $(wildcard $(patsubst %,$(..)%/Makeconfig,\
 958                                             $(config-sysdirs) $(add-ons)))
 959
 960 ifneq (,$(sysdep-makeconfigs))
 961 include $(sysdep-makeconfigs)
 962 endif
 963
 964
 965 endif # Makeconfig not yet included
 966
 967 # Local Variables:
 968 # mode: makefile
 969 # End: